Method and arrangement for supporting hand over of a mobile terminal
First Claim
1. A method in a core network node in a packet switched (PS) first cellular communication system for supporting Hand Over (HO) to a target cellular communication system of a mobile terminal (UE) supporting PS-to-Circuit Switched (CS) HO, the method comprising:
- when requesting resources for HO of a UE engaged in a conversational call to a target node in the target communication system;
signaling a first request for PS resources to the target communication system, indicating a bearer B used for the conversational call; and
signaling a second request for CS resources to the target communication system, indicating the bearer B,thus enabling the target communication system to decide whether a PS-to-CS HO or a PSHO of the bearer B should be performed.
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Accused Products
Abstract
Network nodes in a source and a target communication system, and methods therein for supporting hand over to the target communication system, of a mobile terminal supporting Packet Switched-to-Circuit Switched, PS-to-CS, hand over. The method in the source communication system comprises, when requesting resources for hand over of a mobile terminal engaged in a conversational call to a target node in the target communication system, signaling a first request for PS resources to the target communication system, indicating a bearer B, used for the conversational call, and further signaling a second request for CS resources to the target communication system, indicating the bearer B. Thereby, the target communication system is enabled to decide whether a PS-to-CS HO or a PSHO of the bearer B should be performed.
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Citations
24 Claims
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1. A method in a core network node in a packet switched (PS) first cellular communication system for supporting Hand Over (HO) to a target cellular communication system of a mobile terminal (UE) supporting PS-to-Circuit Switched (CS) HO, the method comprising:
when requesting resources for HO of a UE engaged in a conversational call to a target node in the target communication system; signaling a first request for PS resources to the target communication system, indicating a bearer B used for the conversational call; and signaling a second request for CS resources to the target communication system, indicating the bearer B, thus enabling the target communication system to decide whether a PS-to-CS HO or a PSHO of the bearer B should be performed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A network node operable in a packet switched (PS) cellular communication system, for supporting Hand Over (HO) to a target cellular communication system of a mobile terminal (UE) supporting PS-to-Circuit Switched (CS) HO, the network node comprising a processing circuit configured to:
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when requesting resources for HO of a UE engaged in a conversational call to a target node in the target communication system; signal a first request for PS resources to the target communication system, indicating a bearer B, used for the conversational call; and further signal a second request for CS resources to the target communication system, indicating the bearer B. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method in a target network node in a cellular communication system for supporting Hand Over (HO) of a mobile terminal (UE) that supports Packet Switched to Circuit Switched (PS-to-CS) HO, wherein the network node supports both CS and PS communication and the method comprises:
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receiving a first and a second request for resources for HO of a bearer B, from a source communication system, wherein one of the first and second request is related to CSHO and the other to PSHO; and deciding whether to accept the request related to CSHO or the request related to PSHO based on a criterion related to capabilities of the network node. - View Dependent Claims (16, 17, 18)
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19. A network node for supporting Hand Over (HO) of a mobile terminal (UE) to the network node, the UE supporting Packet Switched to Circuit Switched (PS-to-CS) HO, wherein the network node is operable to be a target network node in a cellular communication system and supports both CS and PS communication, and wherein the network node comprises:
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a receiving unit, configured to receive a first and a second request for resources for HO of a bearer B, from a source communication system, wherein one of the first and second request is related to CSHO and the other to PSHO; and a deciding unit, configured to decide whether to accept the request related to CSHO or the request related to PSHO, based on a criterion related to capabilities of the network node. - View Dependent Claims (20, 21, 22)
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23. A computer readable medium storing a computer program comprising program instructions for execution by a processor in a network node in a packet switched (PS) first cellular communication system that supports Hand Over (HO) to a target cellular communication system of a mobile terminal (UE) supporting PS-to-Circuit Switched (CS) HO, said program instructions configured to cause said network node to:
when requesting resources for HO of a UE engaged in a conversational call to a target node in the target communication system; signal a first request for PS resources to the target communication system, indicating a bearer B, used for the conversational call; and signal a second request for CS resources to the target communication system, indicating the bearer B, thus enabling the target communication system to decide whether a PS-to-CS HO or a PSHO of the bearer B should be performed.
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24. A computer readable medium storing a computer program comprising program instructions for execution by a processor in a target network node in a cellular communication system, to support Hand Over (HO) of a mobile terminal (UE) that supports Packet Switched to Circuit Switched (PS-to-CS) HO, said program instructions configured to cause the target network node to:
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receive a first and a second request for resources for HO of a bearer B from a source communication system, wherein one of the first and second request is related to CSHO and the other to PSHO; and decide whether to accept the request related to CSHO or the request related to PSHO based on a criterion related to capabilities of the network node.
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Specification